Air cleaner



H. R. DAVIES 1,820,530

Aug. 25, 1931.

AIR CLEANER Original Filed May 29, 1919 INVENTOR; H em" R.Dav 1e,s

A TTORNEYS Patented Aug. 25, 4 1931 UNITED STATES PATENT OFFICE HENRY B. DAVIES, OF VALLEY COTTAGE, NEW YORK, ASSIGNOR, BY MESNE ASSIGN- -IENT8, TO THE TILLOTSON MANUFACTURING COMPANY, OF TOLEDO, OHIO, A

CORPORATION OF DELAWAFE AIR CLEANER Original application filed lay 29, 1919,

This invention relates to improvements in air cleaners for removing dust and other foreign matter from the air about to enter the air intake of an internal combustion en- I gine, and is a division of my copending application, Serial Number 300,617, filed May 29, 1919, which has matured into Patent No. 1,708,122, granted April 9, 1929.

One of the objects of the invention is the 1 provision of a cleanerof this character which shall accomplish the cleaning operation without the use of a sieve or dust type cloth either of which when it becomes dirty chokes the air inlet and hence requires attention vat frequent intervals.

A further object is the provision of a dust receptacle in which the dust and foreign particles are deposited, said receptacle being arranged to permit ready removal for cleaning purposes.

Other objects, and objects relating to details of construction and economies of manufacture, will appear as I roceed with the description of those embodiments of the invention, which, for the urposes of the present application, I have i lustrated inthe accompanying drawings, in which:

Figure 1 is a vertical sectional view showing one form of my invention.

Figure 2 is a vertical sectional view showing another form of m invention.

igure 3 is a view simi ar to Figure 2 showing still another form of the invention.

Referring to'the drawings in detail, and particularly Figure 1, the cleaner consists of a cylindrical side section 65, and closed top 66 carrying a depending cylindrical baflie 67.

Through the center of the top 66, the air exit. extends well down into the casing,

ipe 1 its outer end (not shown) being adaptedto be connected to the air intake of a carburetion device for an internal combustion engine. The bottom consists of a flat horizontal rim 68 through which the air inlet perforations 69 are punched, and an integral downwardly and inwardly sloping portion 70 to the lower end of which is threaded the dust cup. I have illustrated the cup as built of a metal frame 71 in the sides of which are openings to 72 exposing to view the contents of the cup Serial No. 309,617. Divided and this application filed larch 8,- 1929. Serial No. 344,873.

through a glass insert 73. Small inverted troughs 74 are mounted upon the upper surface of the rim 68 with their closed ends above the perforations 69 in order to produce a circular motion of the incoming air. Just inside these troughs a cylindrical bafile 75 is carried by-the bottom of the casing. Another cylindrical baflle 76 is carried by the sloping part of the bottom, but separated therefrom so as to leave a narrow annular space through which dust may pass to the dust cup. Entering air moves in a spiral course up between the casing 65 and bafile 75, then downwardly between baflle and 67, upwardly againbetween baffle .67 and 76, downwardly between bafile 76 and pipe 17, and finally upwardly through the latter pipe. During this travel it loses its dust content through surface friction with the bafiie walls, and also artially through centrifugal'force in makmg the turns from upward-to a downward course and vice versa. I

In the form of my invention shown in Figure 2, the top 77 contains air inlet openings 78, and carries at its periphery a depending externally threaded ring 79, upon which is removably threaded the balance of the easing which consists of an integral cu shaped bottom and side wall element 80. Inner and ure 3, the bottom 83 contains the air inlet holes 84, and carries a threaded rin 85, by means of which the bottom is remova ly supported.' The side Wall 86 is cylindrical and 1s secured atits upper edge to the fiat top 87.

A cylindrical bafiie 88 depends from the top I 87, while two cylindrical baffles- 89 and 90 are mounted upon the bottom 83.

In operation, the modifications illustrated Y in Fi ures 2 and 3 are substantially thesame as in igure 1. It should be noted that in the forms of my invention illustrated, the height of the bafies decreases toward the center, and

vthat the distance-between the bafiles increases toward the center. This is for the purpose of compensating for the smaller circular dimensions of the air passages toward the center so as to approximate uniformity in the total cross sectional area of the passages as they approach the center, hence providing for a substantially equal speed or" motion of the air in all parts of the device up to the I time when it enters the outlet pipe.

I am aware that the particular embodiments of my invention above described, and illustrated in the accompanying drawings, are susceptible of considerable variation 10 without departing from the spirit thereof,

and therefore I desire to claim my invention broadly as well as specifically, as indicated by the appended claims.

I claim as my invention:

16 1. In an air cleaner, the combination of a casing having an air inlet and an air outlet; a plurality of substantially annular baffle plates in said casing, said bafiles being so arranged that the cross sectional areas of the 20 annular chambers formed by said bafiie plates are substantially uniform.

2. In an air cleaner, the combination of a casing having end closures, said casing having a peripheral air inlet and an axially ar- 86 ranged air outlet; a plurality of annular baffie plates positioned in said casing, said baffles being so arranged that the velocity of the air remains substantially unchanged in passing through said cleaner.

30 3. In an air cleaner, the combination of a casing, one end of said casing having a peripheral air inlet'and a centrally arranged air outlet; a plurality of baflie plates in said casing for alternatel changing the direction 85 of the movement 0 air therethrough, said bafiie plates being so arranged that the cross sectional areas of the annular chambers formed by said baflle plates are substantially uniform.

In testimony whereof, I afiix my signature.

HENRY R. DAVIES. 

